Shock-absorbing mechanism.



EH. SCHMIDT.

SHOCK ABSORBING MECHANISM.

APPLICATlON men NOV. 30. 1915.

Patented June 5, 1917.

2 SHEETS-SHEEQ.

$1 mmwe'gg E. H. SCHMIDT. SHOCK ABSORBING MECHANJSM. W APPLICATION FILED NUV- 30, 1915- p 1.5:,31 Patented June 0, 1917.

2 SHEETSfSHEET 2- aw Z] ERNEST H. SCHMIDT, 0F CLEVELAND, OHIO, ASSIGINOIt-TO THE NATIONAL MALLEAIBLE GASTINGS COM1ANY,'0F CLEVELAND, OHIO, A CORPORATION OF OHIO.

SHOGK-ABSORBING MECHANISM.

Specification of Letters Patent.

Patented June 5, 1917.

To all whom it may concern:

Be it known that I, ERNEST H. SOHMHYI, a cltlzen of'the United States, and a. reel:

dent of Clevelan'd, Guyahoge county,0h io I have invented new and useful Improve leeseor restoring springsl l, which at one.

ments in Shock-Absorbing Mechanisms, of which the following is a specification, reference being had to the accompanving drew-- in s, in -Which igure 1 is an elevat1on,-partly in section,

of my improved mechanism; Fig. 2 1s a. ver-' ticel section thereof; Fig. 3 is a plan, partly in section, thereof; Fig. 4 is a section on lines IV.-IV of Fig.2; Fig. 5 is a section on lines V'V of Fig. 1; Fig. 6 is an elevation partly in section showing a; modification of my device, end Fig. 7 is a plan, partly in section, thereof. p

My invention relatesto shock absorbing mechanisms of the type in which the frictional elements are comprised of aplurality of frlction shoes arranged about a centralfriction member, and consists in the elimination of the usual cas ng and n a. novel arrangement of stops and releasing mem-.

. bers. My invention also consists in the construction and cooperation of the parts which I shall hereinafter describe. and

claim.

Referring to th'e drewings, 2 indicates a central friction member preferablyformed .at its rear end into an enlarged plate or base i 3 of rectangular shape which is designed to abut ega-inst. the usuel draft sill stops (not SlIOWBg attached to the car structure. -The centre fribtion" member has friction shoes bearing in its reentrent engles, vand the wedgesb end 6 beer ageinstthe friction shoes, forcing them inwardly against the central friction member.

lowenalso intended to beer ageinst draft sill stops.

tron member 2, being'held in position 'there-v by, and beers at its opposite ,endeinstthe. sated .m

forward face 9 of the base 3. npertures 10in the/bum t and held loosely therein by pins 11 erestopmembers 1l, of which I have shown four, h h' W ,thebase 3 and slide insockets '12 in the front. wedge or follower s end beer against The foremost. wedge preferably comprises thefront f0l-' the face 13 of the front follower atthe end of the boiling. movement, so as to, take up and transmit excessive bufing stresses and thereby prevent damage to the gear.

Mounted on the. stop members. are the reol id, bear 'againstthe fqrwsrd face 9 of the basev and .at the other end against forward faces of the shoulderslo on the collars 12 slidably mounted on the stops'll and abutting against the forward wedgeo. The

parts are held in operativejrelation by the bolts 16 which at one end seat in apertures 17 in the base 3 and at the other end in aper tur'es 18 in the front .Wedge 5. Castellated nuts 19 are employed on the bolts 16, so that the parts may be held under slight initial compression. When the nuts 19 have been hail; the buff through the iriction shoes 4' and wedge 6 to the central friction member? '2 and through the intermediate follower 7 to the compression spring 8, which bears against the base 3. of the friction member. The face 13 of the front wedge or follower is so arranged that it will strike the forward ends of the stop members 11 at the end of the travelof the device and just before the parts solid, so as to permit the exo cessive bui ng strains to be taken, up by the 1 base 3 direct from the front follower 5, and thereby relieve the frictional parts from excessive, stress.

g In draft, the base 3 and the central .frip tion member 2' will move forwardly, while the front follower or wedge 5 will be held against-movement, and the spring 8, with the intermediate follower 7 and wedges 5T and 6 'will force the friction shoes .l'aganist the friction member 2.; Just before the do: vice oes solid the foi ward ends of the stop mom ers bear against the face 13 of the front follower cit-wedge 5, thus againactin the front follower.

After the stressesjof buifing or draft have ceased, the release or restorm springs 14, reacting against shoulder 15 0 the collar 12 at one end and the face 11 of the central friction member at the other end, will relieve the wedging engagement between the foretransmit excessive stresses of the dra t to most wedgyand its set of shoes, and the forward faces of the shoulders 15 of the collar 12 will engage the projections 21 on the wedge 6 and drive it forwardly, thus releasing the second set of shoesand permitting the parts to assum e their normal position in the device.

My device is of great advantage, since it provides a rigging of light weight and of simple and strong construction. The central friction member supports the compression sprin ,8, the shoes 4, the wedges 5 and 6 and t e follower 7, while the stop members 11 support the restoring springs 14 and are in turn supported by the foremost wedge and base 3. As the frictional and spring parts of the device are thus self supporting, the usual casing is thus unnecessary.

In Figs. 6 and 7 I have illustrated a modified form of my invention, employing only two releasing springs 14, which are supported on the securing bolts 16' instead of on the stop members 11. I have also shown the inner faces of the outer portions of the base 3 and follower 5 provided with raised compression pads 22, which take up the pressure from the stop members 11 as the gear goes solid.

The terms and expressions which I have employed are used as terms of description and not of limitation, and I have no intention, in the use of such terms and expressions, of excluding any mechanical equivalents of the features shown and described, or portions thereof, but recognize that various structural modifications are possible Within the scope of the invention claimed.

What I claim is;

1. In frictional shock absorbing mechanism a cushioning element comprising friction members and a compression spring, a pair of followers, longitudinally extending stop members seated in sockets in said followers, said stop members being secured to and movable with one of said followers and being capable upon movement of the device to slide insockets in the other follower, said stop members comprising means for limiting the compression of the device.

2. A combined wedge follower-for frictional shock absorbing mechanism, substantially rectangular in form, having parallel outer and inner plane faces, inclined faces intermediate said outer and inner faces, said inner face being apertured for the reception of stop members, and said outer face having at its inner side a plurality of raised compression pads adapted to receive pres sure from the stop members.

3. A combined friction member and follower for frictional shock absorbing mechanism, having a longitudinally extending frictional portion comprising a plurality of radiating arms, a rear base portion of substantially rectangular form, having parallel outer and inner plane faces, said inner face forming a seating surface for springs and being apertured for the recept on of stop,

members, said outer face having at its inner side a plurality of raised compression pads adaptedv to receive pressure from the stop members.

ERNEST H. SCHMIDT. 

